North America Native Plant

Castle Lake Bedstraw

Botanical name: Galium glabrescens harticum

USDA symbol: GAGLH

Life cycle: perennial

Habit: subshrub

Native status: Native to the lower 48 states  

Castle Lake Bedstraw: A Rare Oregon Native Worth Knowing Meet Castle Lake bedstraw (Galium glabrescens harticum), a perennial native plant that calls Oregon home. While you might not find this particular bedstraw variety at your local nursery, it’s worth understanding what makes this Pacific Northwest native special. What is Castle ...

Castle Lake Bedstraw: A Rare Oregon Native Worth Knowing

Meet Castle Lake bedstraw (Galium glabrescens harticum), a perennial native plant that calls Oregon home. While you might not find this particular bedstraw variety at your local nursery, it’s worth understanding what makes this Pacific Northwest native special.

What is Castle Lake Bedstraw?

Castle Lake bedstraw belongs to the fascinating Galium genus, commonly known as bedstraws or cleavers. This particular variety is a perennial forb—basically a non-woody plant that comes back year after year. Like other members of its family, it lacks the thick, woody stems you’d find on shrubs or trees, instead sporting softer, herbaceous growth that dies back to the ground each winter.

As a native species to the lower 48 states, specifically found in Oregon, this bedstraw represents the kind of regional specialization that makes native plant gardening so interesting. Each area has its own unique varieties adapted to local conditions.

Where Does It Grow?

Currently, Castle Lake bedstraw is documented as growing in Oregon. This limited geographic distribution suggests it may be quite specialized in its habitat requirements or simply understudied compared to more common native plants.

Should You Grow Castle Lake Bedstraw?

Here’s where things get tricky. While this native plant sounds appealing in theory, there’s remarkably little information available about Castle Lake bedstraw specifically. This could mean a few things:

  • It might be extremely rare in the wild
  • It could be a very localized variety with limited distribution
  • There may be ongoing taxonomic questions about its classification

Without clear information about its rarity status, growing conditions, or availability, it’s difficult to recommend actively seeking out this particular variety for your garden.

Alternative Bedstraw Options

If you’re interested in adding bedstraws to your Oregon native plant garden, consider looking into other Galium species native to the Pacific Northwest. Many bedstraws offer delicate, airy texture to garden designs and can provide habitat for beneficial insects.

When choosing any bedstraw for your garden, look for varieties that are:

  • Well-documented as to their growing requirements
  • Available from reputable native plant sources
  • Appropriate for your specific growing conditions

The Bigger Picture

Castle Lake bedstraw represents something important in native plant conservation: the reality that many of our native species remain poorly documented or understood. While we can’t provide specific growing advice for this particular plant, its existence reminds us that there’s still much to discover about our native flora.

If you’re passionate about Oregon’s native plants, consider supporting local botanical surveys, native plant societies, or herbarium collections that work to document and preserve our regional plant heritage. Sometimes the most important native plants are the ones we’re still learning about.

For now, Castle Lake bedstraw remains more of a botanical curiosity than a garden-ready native plant. But who knows? With more research and conservation efforts, it might one day find its way into native plant gardens where it can showcase the unique character of Oregon’s diverse ecosystems.

Castle Lake Bedstraw

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Asteridae

Order

Rubiales

Family

Rubiaceae Juss. - Madder family

Genus

Galium L. - bedstraw

Species

Galium glabrescens (Ehrend.) Dempster & Ehrend. - Castle Lake bedstraw

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA